There's like a pinkinsh tube in my fish tank?

4 gold fish that were just over ick. Found out the one was just growing tubercles and didn't actually have ick. The others did though.

Anyways, in the bottom of my tank there is a pinkish thing about 3/4 of an inch or 2-3 cm long. One part looks like a cloudy coloured tube. From thee on it's a pinky/ reddy colour (same as their poop). the opposite end looks squished. I guess you could say it looks like a little long thing of gum.
Any ideas?
 
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